You replication numbers do seem to be on the high. How did you arrive at
those numbers? If you swamp the datanode with too much replication work
than it can do in an iteration (every 3 seconds), things would go bad.
I often check using `ps aux | grep java` all the java processes running
rather
Hi Ravi,
The two datanodes are on different Machines. At the time when these error were
generating I can see that DN1 was replicating under-replicating blocks on DN2.
Can this be related to properties I added for increasing replication rate?
Regards
Om Prakash
From: Ravi Prakash
Hi Omprakash!
DatanodeRegistration happens when the Datanode first hearbeats to the
Namenode. In your case, it seems some other application has acquired the
port 50010 . You can check this with the command "netstat -anp | grep
50010" . Are you trying to run 2 datanode processes on the same
Hi all,
I am running a 4 node cluster with 2 Master node( NN1, NN2 with HA using
QJM) and 2 Slave nodes(DN1, DN2). I am receiving lots of Exceptions in
Datanode logs as shown below
2017-07-26 17:56:00,703 WARN
org.apache.hadoop.hdfs.server.datanode.DataNode:
